42539290 has 32 divisors (see below), whose sum is σ = 81731520. Its totient is φ = 15894144.

The previous prime is 42539279. The next prime is 42539293. The reversal of 42539290 is 9293524.

It is not an unprimeable number, because it can be changed into a prime (42539293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12337 + ... + 15403.

It is an arithmetic number, because the mean of its divisors is an integer number (2554110).

Almost surely, 2^42539290 is an apocalyptic number.

42539290 is a deficient number, since it is larger than the sum of its proper divisors (39192230).

42539290 is a wasteful number, since it uses less digits than its factorization.

42539290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 42539290 is about 6522.2151145144. The cubic root of 42539290 is about 349.0841087584.

The spelling of 42539290 in words is "forty-two million, five hundred thirty-nine thousand, two hundred ninety".